* {
  margin: 0;
  padding: 0;
  -webkit-overflow-scrolling: touch;
}

html body {
  background-color:#fff;
  overflow-y: scroll;  
}

.wrapper {
  position: relative;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  height: 44px;
  line-height:44px;
  width: 100%;
  background-color: #4c88ff;
  text-align:center;
  font-size:17px;
  color:#fff;
}

.content{
  position: absolute;
  top: 44px;
  left: 0;
  width: 100%;
  background-color:#fff;
}

.tail {
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  height:75px;
  background-color:#f5f5f5;
}

.tail {
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 1000;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  height: 75px;
  width: 100%;
  background-color: #fff;
}


 
